687420349 has 8 divisors (see below), whose sum is σ = 857043648. Its totient is φ = 535652160.

The previous prime is 687420337. The next prime is 687420353. The reversal of 687420349 is 943024786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 687420349 - 2¹³ = 687412157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687420329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4463692 + ... + 4463845.

It is an arithmetic number, because the mean of its divisors is an integer number (107130456).

Almost surely, 2^687420349 is an apocalyptic number.

It is an amenable number.

687420349 is a deficient number, since it is larger than the sum of its proper divisors (169623299).

687420349 is a wasteful number, since it uses less digits than its factorization.

687420349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8927555.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 687420349 is about 26218.7022752843. The cubic root of 687420349 is about 882.5529981787.

The spelling of 687420349 in words is "six hundred eighty-seven million, four hundred twenty thousand, three hundred forty-nine".